Regex Tester

Test JavaScript regular expressions with real-time match highlighting.

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Common Patterns

Regex Tester — Test Regular Expressions Online

Test and debug regular expressions with real-time matching and syntax highlighting. Support for all major regex flags.

How to Use

  1. Enter regex pattern — Type your regex in the pattern field.
  2. Select flags — Choose global, case-insensitive, multiline options.
  3. Add test string — See matches highlighted in real-time.

Features

  • Real-time matching with highlighting
  • Match groups display
  • All flags support (g, i, m, s, u)
  • Regex explanation

Use Cases

  • Validating input formats
  • Text extraction patterns
  • Data cleaning scripts

FAQ

What regex flavor is supported?

Uses JavaScript regex engine with full support for modern features.